Flutter Iphone X bottom notch padding fix for fixed bottom button

main.dart

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.purple,
      ),
      home: MyHomePage(title: 'Iphone X'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Column(
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        crossAxisAlignment: CrossAxisAlignment.stretch,
        children: <Widget>[
          Expanded(
            child: ListView.builder(
              itemBuilder: (context, index) {
                return CheckboxListTile(
                  onChanged: (item) => null,
                  value: index % 2 == 0,
                  title: Text('Item $index'),
                );
              },
              itemCount: 25,
            ),
          ),
          FlatButton(
            onPressed: () => null,
            color: Colors.amber,
            child: SafeArea(
              child: Container(
                alignment: Alignment.center,
                height: 60,
                child: Text('SAVE'),
              ),
            ),
          )
        ],
      ),
    );
  }
}